Senior Back-End Developer

Onified.ai is building an intelligent, multi-tenant SaaS business suite for manufacturing enterprises, covering processes from marketing to order execution, supply chain, and operations. They are constructing modern microservices on AWS with a strong emphasis on scalability, performance, and clean engineering practices. **Role Overview:** As a Backend Developer at Onified.ai, you will design, build, and own backend microservices using Java + Spring Boot. Your responsibilities will include defining clean service boundaries, APIs, and data contracts for a scalable microservices architecture. You will build and maintain REST APIs, design and optimize PostgreSQL schemas, and set up backend best practices such as coding standards, reviews, testing discipline, and release hygiene. Additionally, you will mentor a young team, guide them on architecture, debugging, performance, and quality, and implement multi-tenant SaaS patterns for tenant isolation, security, and auditability. You will collaborate closely with frontend, DevOps, and product teams to deliver end-to-end features. **Key Responsibilities:** - Design, build, and own backend microservices using Java + Spring Boot - Define clean service boundaries, APIs, and data contracts for a scalable microservices architecture - Build and maintain REST APIs (versioning, validation, error handling, docs) - Design and optimize PostgreSQL schemas (indexes, constraints, migrations, performance tuning) - Set up and enforce backend best practices: coding standards, reviews, testing discipline, release hygiene - Mentor a young team (1-2 years exp), guide them on architecture, debugging, performance, and quality - Implement multi-tenant SaaS patterns (tenant isolation, security, auditability) - Identify bottlenecks and improve latency, throughput, and reliability (profiling, caching, DB tuning) - Collaborate closely with frontend, DevOps, and product to deliver end-to-end features **Qualifications Required:** - 2+ years of backend experience with Java + Spring Boot - Strong fundamentals of microservices (communication patterns, failure handling, service design) - Strong PostgreSQL knowledge: schema design, indexing, query optimization, transactions - Strong REST API design experience (auth, pagination, filtering, rate limits, validation) - Clear understanding of clean code, testing, and production-grade engineering Onified.ai offers mentorship and leadership opportunities, allowing you to guide a young team and have real architecture ownership with a long-term product impact. The company has a strong engineering culture that focuses on best practices, performance, and scalable design, and you will have the chance to work on manufacturing-scale problems involving complex workflows, high-volume operations, and multi-plant contexts. Onified.ai is building an intelligent, multi-tenant SaaS business suite for manufacturing enterprises, covering processes from marketing to order execution, supply chain, and operations. They are constructing modern microservices on AWS with a strong emphasis on scalability, performance, and clean engineering practices. **Role Overview:** As a Backend Developer at Onified.ai, you will design, build, and own backend microservices using Java + Spring Boot. Your responsibilities will include defining clean service boundaries, APIs, and data contracts for a scalable microservices architecture. You will build and maintain REST APIs, design and optimize PostgreSQL schemas, and set up backend best practices such as coding standards, reviews, testing discipline, and release hygiene. Additionally, you will mentor a young team, guide them on architecture, debugging, performance, and quality, and implement multi-tenant SaaS patterns for tenant isolation, security, and auditability. You will collaborate closely with frontend, DevOps, and product teams to deliver end-to-end features. **Key Responsibilities:** - Design, build, and own backend microservices using Java + Spring Boot - Define clean service boundaries, APIs, and data contracts for a scalable microservices architecture - Build and maintain REST APIs (versioning, validation, error handling, docs) - Design and optimize PostgreSQL schemas (indexes, constraints, migrations, performance tuning) - Set up and enforce backend best practices: coding standards, reviews, testing discipline, release hygiene - Mentor a young team (1-2 years exp), guide them on architecture, debugging, performance, and quality - Implement multi-tenant SaaS patterns (tenant isolation, security, auditability) - Identify bottlenecks and improve latency, throughput, and reliability (profiling, caching, DB tuning) - Collaborate closely with frontend, DevOps, and product to deliver end-to-end features **Qualifications Required:** - 2+ years of backend experience with Java + Spring Boot - Strong fundamentals of microservices (communication patterns, failure handling, service design) - Strong PostgreSQL knowledge: schema design, ind